What is the maximum number of SSL certificates that can be installed on a Web Security Manager Premier appliance?

There is no hard-coded limit to sites or SSL certificates, but a limit may exist based on resource availability (mem/CPU). Alert Logic recommends not going above ~100 sites on a single Alert Logic® Web Security Manager Premier™ (WSMP) instance. Beyond that, you should test before going into production. Use the 100 site limit as a guide for sizing, but not a strict number. For example, if you want to scale 200 sites, plan on utilizing two WSMP instances.